We bought a John lewis branded oven approximately a year ago, within a couple of months the F05 fault started coming up. It turns the oven off and locks your food in the oven. This has happened over and over again. You would think your roast has been cooking, come back and dinner is raw. I have had engineers out 3 times - each time the oven only worked for a couple of weeks and then the problem started again. Told on the 3rd time, if the issue occurred again, they would replace the oven. 4th time comes around, the engineers come around and then state they can't do anything about it because I had managed to restart the oven. Each time I reported the problem, it took 3 hours on the phone and a further 2/3 weeks for them to come out. Fifth time, I have now had no reliable oven for 2/3 weeks...they are refusing to do anything until another engineer comes out. They are arguing with a subcontract about the issue. I am now 5 days out of work, no oven and completely out of patience! John Lewis appliance - awful! John Lewis guarantee - pointless! John Lewis service - horrendous!